The Planted Tank Forum - View Single Post - Lighting an Aquarium with PAR instead of Watts
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post #114 of (permalink) Old 01-25-2013, 03:03 AM Thread Starter
Hoppy
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Quote:
Originally Posted by Switch View Post
Thanks for quick reply!! Can u please elaborate a bit on why u think that?? But dont go too crazy...
Light reflects off the water surface in increasing amounts as the angle between the vertical and the light increases - at 0 degrees, straight down into the water, virtually no light is reflected, but at 90 degrees, parallel to the water, or close to it, most of the light is reflected. When the surface is rippled, a lot of the surface is at lower angles to the incident light even way off to the side from the light. So, that might lead to a higher PAR. But, I haven't tested this idea.

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